GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1456295  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Clean any dirt from around the differential fill plug.
  3. Remove the fill plug and washer from the differential.
  4. Check the differential fluid level. it should be even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
  5. Add new fluid if necessary. For the recommended fluid, refer to Lubrication Specifications.
  6. Caution: Refer to Fastener Caution in the Preface section.

  7. Install the fill plug and washer to the differential.
  8. Tighten
    Tighten the differential fill plug to 35 N·m (26 lb ft).

  9. Lower the vehicle.